<template>
  <div class="app-container">
    讲师表单
     <el-form label-width="120px">
      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" controls-position="right" min="0"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像：TODO -->
      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">

          <!-- 头衔缩略图 -->
          <pan-thumb :image="teacher.avatar"/>
          <!-- 文件上传按钮 -->
          <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
          </el-button>

          <!--
      v-show：是否显示上传组件
      :key：类似于id，如果一个页面多个图片上传控件，可以做区分
      :url：后台上传的url地址
      @close：关闭上传组件
      @crop-upload-success：上传成功后的回调 
        <input type="file" name="file"/>
      -->
          <image-cropper
                        v-show="imagecropperShow"
                        :width="300"
                        :height="300"
                        :key="imagecropperKey"
                        :url="BASE_API+'/eduOss/oss/upload'"
                        field="multipartFile"
                        @close="close"
                        @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>

  </div>
</template>
<script>
import {getTeacherInfo,updateTeacher,addTeacher} from '@/api/teacher.js'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'
export default {
    components: { ImageCropper, PanThumb },
    data() {
        return {
            teacher:{
            name: '',
            sort: 0,
            level: 1,
            career: '',
            intro: '',
            avatar: ''
           },
            //上传弹框组件是否显示
            imagecropperShow:false,
            imagecropperKey:0,//上传组件key值
            BASE_API:process.env.BASE_API, //获取dev.env.js里面地址
           saveBtnDisabled:false  // 保存按钮是否禁用,
        }
    },
    created() {
        this.init()
    },
    watch: {  //监听
    $route(to, from) { //路由变化方式，路由发生变化，方法就会执行
      this.init()
    }
  },
    methods: {
        close() { //关闭上传弹框的方法
            this.imagecropperShow=false
            //上传组件初始化
            this.imagecropperKey = this.imagecropperKey+1
        },
        //上传成功方法
        cropSuccess(data) {
            console.log(data)
            this.imagecropperShow=false
            //上传之后接口返回图片地址
            this.teacher.avatar = data.url
            this.imagecropperKey = this.imagecropperKey+1
        },
        init() {
            //判断路径有id值,做修改
            if(this.$route.params && this.$route.params.id) {
                //从路径获取id值
                const id = this.$route.params.id
                //调用根据id查询的方法
                this.getInfo(id)
            } else { //路径没有id值，做添加
                //清空表单
                this.teacher = {}
            }
        },
        //根据讲师id查询的方法
        getInfo(id) {
            getTeacherInfo(id)
                .then(response => {
                this.teacher = response.data.teacher
                })
        },
        saveOrUpdate() {
            //判断修改还是添加
            //根据teacher是否有id
            if(!this.teacher.id) {
                //添加
                this.saveTeacher()
            } else {
                //修改
                this.updateTeacherInfo()
            }
        },
        saveTeacher() {
            addTeacher(this.teacher)
                .then(response => {//添加成功
                //提示信息
                this.$message({
                    type: 'success',
                    message: '添加成功!'
                });
                //回到列表页面 路由跳转
                this.$router.push({path:'/teacher/list'})
                })
        },
        //修改讲师的方法
        updateTeacherInfo() {
          updateTeacher(this.teacher)
            .then(response => {
            //提示信息
            this.$message({
                type: 'success',
                message: '修改成功!'
            });
            //回到列表页面 路由跳转
            this.$router.push({path:'/teacher/list'})
            })
        }
    }
}
</script>